grammar SSA
rule subtitles info? styles? event_section fonts? graphics? end_of_data <Titlekit::SSA::Subtitles> end rule info '[Script Info]' end_of_line lines* end_of_section <Titlekit::SSA::ScriptInfo> end rule styles '[V4 Styles]' end_of_line lines* end_of_section <Titlekit::SSA::V4PStyles> end rule event_section '[Events]' end_of_line line events end_of_section end rule events line* <Titlekit::SSA::Events> end rule event 'Dialogue' end rule fonts '[Fonts]' end_of_line lines* end_of_section end rule graphics '[Graphics]' end_of_line lines* end_of_section end rule lines line+ end rule line string (end_of_line / end_of_file) end rule end_of_section end_of_line+ / end_of_file end rule end_of_line "\r\n" / "\n" / "\r" end rule end_of_data end_of_line+ / end_of_file end rule end_of_file !. end rule number [0-9]+ end rule string (!end_of_line .)+ end
end